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Where to mount the075/077?

Greetings,
glad to see everythings up and running,Ive been working on mounting my 2390 horns on top of my cabinets for some time now and I'm at the point that I need some input for the forum,please see picture--I guess my question is,should I mount the 075/077 under the 2390 or mount it on top of the 2390

Well I would look at the height from the floor as a major consideration. The 2405 is very beamy in the vertical axis so I would mount it as close to ear level as I could. You can go either way. Most of the large format monitors had it next to the midrange horn. The 4333 was above and the Classic Audio Reproduction speakers the Westlake monitors the new 4368 all have it bellow the horn at ear level.

I agree with Rob, you want it near ear level, if this isn't possible you can angle it upward or downward toward your expected listening location. Secondarily I would be concerned with the cabinet or mid lens causing early reflections. This can be reduced by using some type of sound absorbing material.

Finally, yes the 077/2405 is beamy vertically, but the 075/2402 is beamy in both axes.

Yes,I will be trying out both models,I also be trying out lx5-lx13-n7000-n8000 and rane ac23,I'm still working on the other channels(sub,rear,side)as well,at this point I could add both drivers at the top and bottom,but that maybe overkill,so I think I will just add the driver to the bottom of the horn and see how that sounds

I am not a big fan of the LX-5 N7/8000 vintage crossovers, you might consider building your own based on newer JBL pro designs. I have done this with great success. (With a little help from Giskard)

I was using the Rane AC 23 in my home theater, I am now using AC 22s for my three front channels. They are very flexible, but I don't think the circuitry is as open and free from a opamp grunge as I want in a dedicated two channel music system.

Don't get me wrong, music sounds fantastic through them, but just not as good as it can get.

that opamp grunge

Mr. widget, what your describing is something Ive experienced with all 24 db per octave filters! Its not open, sounds compressed as you push it. On the other hand, 18 db filters sound the opposite. very open and dimensional and free, at least more free, to my ears from grunge! rane gear in particular has that hashy mid.